Alfred stark



ALFRED STA-RR, .-O'F- NEW-YORK, N; Y.

Letters Patent No. 78,023, dated 'May 19, 1868.

IMPROVED SUI-DER FOR ALUMINUM.

flihe 5x11211111; xzfzmt min flgm 21m fiatmt miu mating tart if it: same.

TO ALL WHOM IT MAY CON OERN 7 Be it known that I, ALFRED STARR, of the city and State of Neiv'York, have invented, made, and applied to use a. certain new and useful Improvement in Solder for Aluminum and Ida hereby. declare the following to be a. correct, description of the nature of the said-improvement. I t

I havediscovered thattin mixed with aluminum will form an alloy that melts at a lower temperature than aluminum, and that said alloy possesses the properties necessary for a solder, as it unites freely with aluminum when said solder is melted.

The tin being light, and of nearly the same color as aluminum, the alloy can scarcely be distinguished from the aluminum, hence articles soldered with such alloy are not injured their appearance, and in plates for artificial teeth, and other articles exposed to acids or other'discolorinz t-agents, my solder is almost iis littleeati'ec-ted as the aluminum itself. I

I find that one-eighth, by weight, of tin toseven-eighths of aluminum will form an alloy that melts at a sufliciently less temperature than aluminum, to fellow of its being used as a solder, but by increasing the pIOPOF.

tion of tin the point of fusion will be lessened.

If desired, to make the solder harder, a portion of silver maybe added, without injuryto said solder. What I claim, and'desire to secure by Letters Patent, is- I Thealloy specified, forming a solder for aluminum.- 7 In witness whereof, I have hereunto set my signature, this 31st day of March, 1868.

I ALFRED STARR.

Witnesses:

Guns.- H. SMITH, Gnu. D. WALKER. 

